<apex:outputPanel id="out">
<b><apex:outputText style="text-align:right;font-size:15px;color:black" value="Average Risk Score"/> &nbsp; &nbsp; <apex:outputText style="text-align:right;font-size:14px;color:blue" value="{!Account_Summary__c.Average_Risk_Score__c}"/> </b>
<b><apex:outputText style="text-align:right;font-size:15px;color:black" /> &nbsp; &nbsp; <apex:outputText style="text-align:right;font-size:14px;color:blue" value="{!averageTotalRisk}" rendered="{ISBLANK({!averageTotalRisk})}" />  </b>
</apex:outputPanel>
<br></br> <br></br>
  <table class="htmlRiskTable">
           <tr valign="center">
              <td>
              <apex:outputText style="text-align:right;font-size:12px;color:blue" value="Underwriting Audit Risk Score" title="Seasoned UW department, well managed, good controls, good documentation, good pricing decisions vs. inexperienced staff, lack of management controls, poor documentation, unjustified price cutting"/>
              </td>
              <td>
                <apex:selectRadio id="Radio1" value="{!Account_Summary__c.Risk1__c}" style="margin-top: -10px;">
                <apex:actionSupport event="onchange" rerender="out" action="{!calculateaverageRisk}"/>
                 <apex:selectOptions value="{!AuditItems}"/>
                </apex:selectRadio>
              </td>
             </tr>

public List<SelectOption> getAuditItems() {
    List<SelectOption> options = new List<SelectOption>();
    options.add(new SelectOption('0', 'No Audit in the Last 3 Years'));
    options.add(new SelectOption('0', 'Poor'));
    options.add(new SelectOption('5', 'Average'));
    options.add(new SelectOption('10', 'Superior'));
    return options;
}

//calculate the average risk based on the logic
Public void calculateaverageRisk() {
    if ((AccountSummary.Risk1__c == null) || (AccountSummary.Risk2__c == null) || (AccountSummary.Risk3__c == null) || (AccountSummary.Risk4__c == null) || (AccountSummary.Risk5__c == null) || (AccountSummary.Risk6__c == null) || (AccountSummary.Risk7__c == null) || (AccountSummary.Risk8__c == null) || (AccountSummary.Risk9__c == null) || (AccountSummary.Risk10__c == null)) {
        averageTotalRisk = 'Select a score fore every risk.';
    } else {
        TotalRisk = ((integer.valueof(AccountSummary.Risk1__c) + integer.valueof(AccountSummary.Risk2__c) + integer.valueof(AccountSummary.Risk3__c) + integer.valueof(AccountSummary.Risk4__c) + integer.valueof(AccountSummary.Risk5__c) + integer.valueof(AccountSummary.Risk6__c) + integer.valueof(AccountSummary.Risk7__c) + integer.valueof(AccountSummary.Risk8__c) + integer.valueof(AccountSummary.Risk9__c) + integer.valueof(AccountSummary.Risk10__c)));
        Integer TotalRiskCalc = Integer.valueOf((TotalRisk / 100)*100);
        averageTotalRisk = string.valueof(TotalRiskCalc);
        this.AccountSummary.Average_Risk_Score__c = TotalRiskCalc;
    }
}